Cursor is randomly missing

Sometimes my cursor just disappears,but i can still interact with things.After switching Tabs or some time the cursor then appears again

You haven't included very much information in your post. Assuming this is occurring on some flavour of the Windows OS, could you try reproducing the problem after your PC has performed a Clean Boot, before restarting the PC again, and without opening other programs?

https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd